Electric time-switch mechanism



A. R. ROSAMOND.

ELECTRIC TIME SWITCH MECHANISM.

APPLICATION FILED JUNE I0, 1921.

Patented July 4, 1922'.

2 SHEETS-SHEET 1.

A. RL'ROSA MOND.

"ELECTRIC TIME SWITCH MECHANISM.

' APPLICATION FIL ED JUNE 10, 1921.

' Patented July 4,1922 I 2 SHEETSSHEET 2 UNITED STATES PATENT OFFICE.

ARTHUR H. ROSAMOND, OF LARAMIE, WYOMING, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO DORIS IE. SODEN, OF KANSAS.

ELECTRIC TIME-SWITCH MECHANISM.

To all whom it may concern:

Be it known that I, ARTHUR E. Ross- MOND, a citizen of the UnitedStates, residing at Laramie, in the county of Albany and State ofl/Vyoming, have invented certain new and useful Improvements in ElectricTime-Switch Mechanism, of which the following is a specification.

This invention relates to electric switches for automatically closingand opening .elec tric light circuits at times controlled by clockmechanism.

According to my invention I provide improved means whereby an electriclight circuit may be automatically closed to turn on the electric lightsat any desired time and may then without further attention beautomatically opened to turn off the lights at a predetermined time. Theinvention is especially applicable to lights in stores and otherbusiness houses where it is desired that the electric lights should belit in the early part of the night and then turned off in the latterpart thereof. To do this I provide switch mechanism controlled by twoclocks, such as ordinary alarm clocks, one clock being employed toautomatically turn on the lights and the other to turn them off. Themechanism is mounted in a suitable casing and the switches are properlyinsulated from the casing and from each other to prevent accident. Theelectrical conductors are led in and out through guides of insulatingmaterial which eifectively prevent short circuits. The feed wires areconnected with one of the switches and the lamp wires with the other.Parts of the two switches are connected with each other in such mannerthat when the two switches are closed, the lights will be lit, but whenone of the switches is open, the lights will be extinguished.

In the accompanying drawings Figure 1 is a perspective view of an apparatus embodying my improvements.

Figure 2 is a diagrammatic view showing particularly the switchmechanism and how itis connected with the circuit wires.

Figure3 is a rear view in longitudinal vertical section, showing theswitches set to light the lamps.

Figure t is a view similar to Figure 3, showing how the switch mechanismis opened to extinguish the lamps.

The switch mechanism may be enclosed in a metal casing A having a hingeddoor 0.

Specification of Letters Patent. Patented July 4, 1922 Application filedJune 10, 1921.

Serial No. 476,482.

and a catch a. Two alarm clocks are in dicated at C, C which may be heldin place by straps C These clocks may be arranged on the top of thecasing or at other suitable parts thereof. The two switches employed areindicated at D and E. These switches are mounted on blocks F ofinsulating material, such as porcelain so that they are completelyinsulated fromthe box or casing A. The switch D comprises two posts (Z,.(Z, to one of which is pivoted a blade (Z and to the other, a blade 0?.These blades, at their outer ends, are connected by a cross piece 65* ofinsulating material. To the cross piece d is hinged a verticallyarranged bar (Z having a bent upper end (3 adapted to engage the windingmechanism c of the alarm clock C. A spring 9 tends to lower the bar whenreleased by the key 0 so as to close the switch.

Circuit wires H, H enter through blocks I of insulating materialarranged in the bot tom of the box and these wires are connected to theposts (i d". r v

The other switch E is constructed and mounted in a. similar way. Theposts e, e are secured to the block F. To the post e is pivotallysecured a blade 6 and to the post 0 is pivoted another blade 6 Theseblades are connected by a cross piece a of insulating material and tothis cross piece is hinged a bar (2 having a bent upper end 6 adapted toengage the winding key 0' of the clock C. The posts d and e areelectrically connected at w, and the posts cl and c are electricallyconnected at y.

Referring to Figure 2, the current from the feed wire enters at H anddeparts at II. There is no closed circuit through the apparatus wheneither switch is raised or open. lVhen both switches I) and E areclosed, the lights will be lit. The closed circuit maybe traced asfollows (Figure 2): It enters at H, passes from post (i through blade dto post 05, then through connection :0 to post 6, through blade 6 topost 6 then through supply wires L and L to post 6", then through blade6 to post 6 through connection 'y to post d, through blade a? to post (Zand out through wire H. It will thus be seen that if either switch isopen, there will'be no current for the lamps.

In using the apparatus, one of the alarm clocks is set to turn on thelights at the desired time, and the other to turn them 2 naerass offafter a predetermined interval. The bar (5 is made to engage the windingkey of the clock C in the manner indicated in Figure 1. and the switch Eis then. closed. This clock is preferably used to determine the timewhen the lights are to be lit. The bar 6 is made to engage the windingkey 0 of the clock C, which is set to indicate when the lamps are to beturned off. When the bars (Z and e are thus set, the switch I) is openand the switch E closed and at this time there can, of course, be noclosed circuit through the lamps. When the time for the lights to beturned 011 arrives, the winding key 0 will release the bar (Z and thespring 9 will cause the switch D to close and the circuit through thelamps will be established. The lights will then remain on until the timefor opening the circuit arrives, which is predetermined by the clock Cwhich at this time releases the bar e and the spring 9' opens the switchE and the circuit is broken.

In the drawings, Figure 1, it will be ob served that the alarm mechanismof the clock 0 is set for SlX oclock and the alarm mechanism of theclock C is set for twelve oclock. Assuming the store to be closed atfive oclock, the lamps will be automatt cally lit at six oclock when thealarm clock C operates. The lights will remain on until twelveoclock-iniduight 'wheu the alarm mechanism of the clock C operates toopen the circuit to extinguish the lights.

The apparatus, it will be observed, is extremely simple. It may be setVery quickly and requires no great amount of intelligence to set it, itbeing a simple matter to set the clocks and to perfect the engagement ofthe switches with the clocks in the manner before described. Experiencehas demon-- strated that the switch mechanism is absolutely reliable. Itmay be set when the store is closed in the afternoon or any other timein the day or early evening. The lights will be turned on at the propertime and turned off in due season. The apparatus may be very easilyconnected with lamp circuits already in use or be attached when thelights are being installed.

I claim as my invention:

Electric time switch mechanism comprising two separately operablecircuit rontroh ling switches. a casin enclosing them, a piece olinsulating l'i proof material on which the switches are mounted. twoclocks mounted on the outside oil. the top of the casing and securedthereto, a spring associated with one of the switches and tending toopen it, anothcr spring associated with the other switch and tending toclose it, a rod hinged to one oi? the switches and extending directlytherefrom through till top of the ca and engaging the winding key of oneor the clocks to hold sa d switch open and another similar rod lunged tothe other switch and extending directly therefrom through the top of thecasing and engaging the winding key of the other clock to hold theassociated switch rlosed.

in testiniiiiny whereol. l have hcrcui'ito subscribed my name.

ARTHUR H. ROSAli IOND.

